Drawing-pen.



No. 817,861. PATENTED APR, 17, 1906. -A. MERTBS.

DRAWING PEN.

APPLIGATION FILED JUNE 24, I905.

' bly mounted upon the lower terminal of the AUGUST MERTES, OF EMSVVORTH, PENNSYLVANIA.

DRAWlNGw-PENI.

Specification of Letters Patent.

Patented April 17, 1906.

Application filed June 24,1905. Serial No. 266,790.

.L0 aZZ whom it may concern:

Be it known that 1, AUGUST MERTEs, a citizen of the United States, residing at Emsworth, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Drawing-Pens, of which the following is a specification, reference being had therein to the accompanying drawings, forming part of the specification, in which- Figure 1 is a view in edge elevation of my improvement in dotting attachments for drawing-pens. Fig. 2 is a similar face view thereof. Figs. 3 and 4 are enlarged views of the lower portion of the pen, illustrating the raising-wheel in different positions. Fig. 5 is a cross-sectional view on the line V V of Fig. 2. 1

My invention refers to improvements in drawingpens; and it consists of a device adapted to be attached to the pen or one of the blades thereof, provided with a wheel having a series of tread-abutments rotataattaching-support in proximity to the working point of the pen.

The object in view is to intermittently lift the point of the pen away from the paper as it is drawn along a straight edge or otherwise, whereby the pen-point is intermittently in working relation to the paper, so as to draw a line in the usual way, and is also intermittently raised away from contact by the lifting action of the wheel, due to the engagement with the paper of the abutments arranged around its periphery.

Referring now to the drawings, 2 represents the handle of the pen, provided with the usual separable blades 3, terminating in the working points controlled by the customary thumb adj Listing-screw 4:.

5 is a frame or bracket of any suitable construction or design adapted to be affixed to one of the blades of the pen or to any suitable portion thereof, preferably frictional spring engagement with the sides of the blade, as indicated in cross-section in Fig. 5, or in any other suitable manner. It is desirable, however, that the frame 5 shall be readily attachable and detachable and also capable of longitudinal adjustment, so as to throw it into and out of operative position on the pen without removal. This latter function is conveniently provided for by forming the upper portion of the frame 5 in fork shape, as shown in Fig. 2, whereby it will em-, brace the blade 3 by its edges with a sufficient amount of spring gripping action. It is also easily shifted upwardly or downwardly or entirely detached, as stated, so that the pen may be used in the usual way.

Rotatably mounted at the lower end of the frame upon a pivot-pin 6 is the wheel 7, having arranged around its periphery a series of projections or abutments 8, more or less closely arranged as desired, which abutments will come into contact with the surface of the paper from time to time and will result in lifting the point of the pen away therefrom. During such lifted position of the pen as it is drawn forward the frame 5 will ride upon the pivot 6 until the periphery 9 of the wheel 7 again comes into contact with the paper, as shown in Fig. 3, and as long as the wheel 7 rides upon its periphery the pen will draw a straight line in the customary manner. During the time, however, that the pen is raised away from contact the pen will not operate and will leave an open space between the terminals of the intermittent lines, depending upon the location of the abutments. It will thus be seen that when the pen is drawn continuously along a straight edge a resulting continuously-dotted line will be drawn without the usual lifting and lowering of the pen, which is necessary in the present method of drawin dotted lines.

It will be understood that the proportions of the device, its design, method of attachment, or other features of detail may be changed or varied by the skilled mechanic, but that all such changes or variations are to be considered as within the scope of the following claims.

I claim 1. A dotting attachment for drawing-pens consisting of a bifurcated frame having spring-terminals adapted to resiliently clamp upon the edges of the pen-blade, and provided with a pivotally-mounted wheel having a series of peripheral abutments, substantially as set forth.

2. The combination with a drawing-pen, of a dotting device consisting of a removable frame having a bearing-wheel provided with wheel having peripheral abutments, substanperipheral abutments, and bifurcated spring tially as set forth. 1o extremities adapted to clamp the edges of In testimony whereof I affix my signature the pen, substantially as set forth. in presence of two witnesses.

3. A dotting attachment for pens consist- AUGUST MERTES. ing of an attaching-arm provided with resili- Witnesses: ent forks adapted to embrace the blade of CHAS. S. LEPLEY,

the pen and provided with a pivotal bearing- 0. M. CLARKE. 

